README file is out-of-date

[gvallee]

Version

v1.0 and master

Description of the problem

Comparing the README file in the repository and the similar document at https://open-mpi.github.io/mtt/ shows a big discrepancy, especially since the Python client is now (if I understand correctly) the only supported client. Since the README file is included in v1.0 of the Python client, this means that the README file shipped in the tarball is pretty much out-of-date and does not include any of the useful information to use the Python client. I personally believe it would be more useful to simply point to https://open-mpi.github.io/mtt/

Expectations

I believe the README file should include the information that is necessary to use the Python client.